Something new on graffiti-allowed section of the river flood wall. However, no list was provided. Maybe the panel is designed to be thought-provoking. You have to figure it out for yourself. Is it worth the bother?
There have been suggestions offered in the past. My high school library in The Bronx had a great selection of magazines. One of them was called Sing Out, the premier folk music magazine of the day. From time to time they ran columns by a great blues harmonica player, Tony "Little Son" Glover.
In the spring of my senior year, when I had decided to attend St. Louis U, he wrote a piece called The Ten Best Things To Do When You Get The Blues. Number 1, the ultimate act, said simply: Piss in the Mississippi. It will give you a feeling of immortality.
So you can guess what one of first things 17 year old me did when he hit town. By the way, it didn't really help.